I'm not sure what that number means, but she is having to turn it up more than 75% of the max. volume, she may have a problem. Maybe check the Sound Settings (the manual is available
here). Note that there is also a DIGITAL audio output, but that doesn't apply here.
Glad I checked: her TV has a mini-jack (1/8") for audio output. She would need
this cable from Monoprice (also available at Radio Shack).